feat: repository issues table toolbar

[andriypolanski]

Summary

The repository Issues table toolbar lacked client-side search, filter pills had uneven label/count presentation, and the header layout did not adapt well on small screens (no compact search entry point, filters competing with the title on one wrapped row).

Related Issues

Closes #1164

Type of Change

• Bug fix
• New feature
• Refactor
• Documentation
• Other (describe below)

Screenshots

Before

before.mp4

After

after.mp4

Checklist

• New components are modularized/separated where sensible
• Uses predefined theme (e.g. no hardcoded colors)
• Responsive/mobile checked
• Tested against the test API
• npm run format and npm run lint:fix have been run
• npm run build passes
• Screenshots included for any UI/visual changes

Solution

1. Client-side search (RepositoryIssuesTable.tsx)
2. Filter button alignment (FilterButton.tsx)
3. Responsive issues toolbar (RepositoryIssuesTable.tsx)

Files

File	Change
src/components/repositories/RepositoryIssuesTable.tsx	Search pipeline, toolbar layout, mobile search, empty copy
src/components/FilterButton.tsx	Shared pill alignment / typography (all usages)

[andriypolanski]

Hi @anderdc,

First of all, thanks for taking the time to review.

I opened this PR as an updated version because #738 was closed without being resolved.

Please review it when you have a chance. If there are any other issues, feel free to leave a comment and I’ll fix them as soon as possible.

Thanks again.